Veritas- My favorite action/martial arts series ever. Its manwha but still check it out. The series can be confusing at times but everything becomes clear by the end. Has some of the best artwork I've ever seen and I'm not just talking about the beautiful women either

silver diamond (read up to vol 15 ch44)(waiting for more releases still of translation)
Betrayal Knows My Name

I also read loveless but I didnt find that as interesting as the other to. With silver diamond being my favorite out of the 3. Silver diamond was just something different from the manga I had been reading. So it was really something new to read and I enjoyed that alot.